Sarah Palin

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Associated Press BEARING DOWN: Former Alaska Gov. Sarah Palin has endorsed the opponent of fellow "grizzly mama" Sen. Lisa Murkowski.

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Associated Press Alaska's former governor Sarah Palin stands in the governor's mansion with Sen. Lisa Murkowski, Alaska Republican, in Juneau in 2008. Mrs. Palin has endorsed long-shot Joe Miller in his quest to unseat Mrs. Murkowski, the GOP's clear choice.

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In this April 14, 2010 file photo, Sarah Palin flashes a thumbs-up towards her husband, Todd, as she begins to address a crowd during a stop of the Tea Party Express on Boston Common in Boston. After months of requests from reporters, a California university on Friday, June 18, 2010 agreed to allow members of the media to attend a fundraiser next week featuring Sarah Palin. (AP Photo/Charles Krupa, File)

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Former Alaska Gov. Sarah Palin sits with her husband, Todd Palin, during the "Lessons From Leaders" speakers series on Saturday, April 17, 2010, in Washington, Ill. (AP Photo/Journal Star, Adam Gerik)

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Tina Fey (left) plays Alaska Gov. Sarah Palin to Amy Poehler's Sen. Hillary Rodham Clinton on "Saturday Night Live" in September 2008. (Associated Press, file)

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Hackers broke into Alaska Gov. Sarah Palin's Yahoo e-mail account, a screenshot of which is taken from Gawker.com, on Sept. 17. The Republican vice-presidential nominee used the webmail site to send official correspondence. (Associated Press)

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This screen shot from Gawker.com shows a personal e-mail account of Republican vice-presidential candidate Gov. Sarah Palin, captured by a hacker who posted the material. (Associated Press)

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**FILE** Sarah Palin's supporters brandish signs of her depicted as feminist icon Rosie the Riveter while waiting to see Mrs. Palin and Sen. John McCain on Sept. 9, 2008, at a rally at Franklin & Marshall College in Lancaster, Pa. (Associated Press)

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Alaska Gov. Sarah Palin (Associated Press)

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Bristol Palin, 17, holds her brother Trig during the campaign rally where Sen. John McCain introduced Bristol and Trig's mom, Alaska Gov. Sarah Palin, as his vice presidential running mate in Dayton, Ohio, on Friday. Sarah Palin said Monday that her 17-year-old unmarried daughter is five months pregnant. (Associated Press)

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** FILE ** Todd Palin (center) drives his wife, Alaska Gov. Sarah Palin, to the starting line of the Iron Dog snowmobile race in Big Lake, Alaska, on Feb. 11, 2007. (AP Photo/Al Grillo)